Porting newlib

[Venkataramanan Kumar]

I am trying to build run time C library for my 32 bit RISC. I have
ported the GCC compiler, the libgcc.a library and binutils.

I want to build some applications using the ported GCC tool chain. I
am planning to run them in GDB.

My search in the web said that I need to crt0.s.

Can you brief me on  crt0.s and on porting newlib. My architeture is MIPS based.

Regards,
Venkat